In stratosphere, which of the following element acts as a catalyst in degradation of ozone and release of molecular oxygen?

1. Carbon
2. Cl
3. Fe
4. Oxygen

Subtopic:  Ozone Layer Depletion |
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Which of the following is a secondary pollutant?

1. CO
2. CO2
3. SO2
4. O3

Subtopic:  Introduction to Pollution & Types |
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World Ozone Day is celebrated on

1. 5th June
2. 21st April
3. 16th September
4. 22nd April

Subtopic:  Ozone Layer Depletion |
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Match the items given in Column I with those inColumn II and select the correct option givenbelow: 
Column I                                     Column II 
a. Eutrophication                          i. UV-B radiation 
b. Sanitary landfill                        ii. Deforestation 
c. Snow blindness                        iii. Nutrient enrichment 
d. Jhum cultivation                       iv. Waste disposal

1. a-ii b-i c-iii d-iv

2. a-i b-iii c-iv d-ii

3. a-iii b-iv c-i d-ii

4. a-i b-ii c-iv d-iii

Subtopic:  Water Pollution: I | Solid Waste Pollution | Improper Resource Utilisation & Maintenance | Water Pollution |
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Which one of the following statements is not valid for aerosols ?

1. They are harmful to human health
2. They alter rainfall and monsoon patterns
3. They cause increased agricultural productivity
4. They have negative impact on agricultural land

Subtopic:  Air Pollution |
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A lake which is rich in organic waste may result in
(1) increased population of aquatic organisms due to minerals

(2) drying of the lake due to algal bloom

(3) increased population of fish due to lots of nutrients

(4) mortality of fish due to lack of oxygen

Subtopic:  Water Pollution: I | Water Pollution |
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The highest DDT concentration in aquatic food chain shall occur in 
(1) phytoplankton

(2) seagull

(3) crab

(4) eel

Subtopic:  Water Pollution: I | Water Pollution |
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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers
(1) ozone

(2) ammonia 

(3) methane

(4) nitrous oxide

Subtopic:  Ozone Layer Depletion |
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Joint Forest Management Concept was introduced in India during
(1) 1970s

(2) 1980s

(3) 1990s

(4) 1960s

Subtopic:  Improper Resource Utilisation & Maintenance |
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A river with an inflow of domestic sewage rich in organic waste may result in

1. increased population of aquatic food web organisms

2. an increased production of fish due to biodegradable nutrients

3. death of fish due to lack of oxygen

4. drying of the river very soon due to algal bloom

Subtopic:  Water Pollution: I |
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